Revert "[primTorch] Improve `narrow` and `narrow_copy`: refs, tests, docs (#87045)"
This reverts commit aa8279bcb8687e025a666e18828a436eb7ef7b45.
Reverted https://github.com/pytorch/pytorch/pull/87045 on behalf of https://github.com/izaitsevfb due to BC-breaking change, D41161182
